I just booked a 1BR for VGC for President's Day week in February at 7 months. I was worried about it, because #1, President's Day week. #2, it is the last week at (much) lower points until September. We leave for home Feb 23, the day the points jump up.
I began looking at availability 3-4 days before my actual trip date 7 month window opened, and I saw the room was available starting on that Monday. And I got it.
With VGC, I think weekends are popular, many owners live in California, have APs, etc. It is different than WDW where people go for a week. And because the weekend before President's Day WAS all booked, (the Fri/Sat/Sun nights), no one could "walk" their new 7 month reservation thru that roadblock, which helped me get my dates. I think. I wanted to arrive on Sunday, but Monday is fine, I booked 6 nights.